Automatic metal-working machine.



P. E. BRIGHTMAN. AIfTOMATIG METAL WORKING MACHINE APPLICATION FILED APB. 22.1908.

937,762. -'Patented 001;. 26, 1909.

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wiflesses F. E. BRIGHTMAN. AUTOMATIC METAL WORKING MACHINE. I APPLIOATIONI'ILED APE.22.1908. 937,762. Patented Oct. 26, 1909. a sums-sum 2.

War/(rig F. E. BRIGHTMAN. AUTOMATIC METAL WORKING MACHINE.

APPLICATION I'ILED'APR. 22.1908.

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NITED sTArEs PATENT ()FF-ICE.

FRANK E. BRIGHTMAN, E SANDUSKY, OHIO, ASSIGNOR'TO THE. BRIGI-ITMAN HAM- MERED NUT & MANUFACTURING COMPANY, OF SANDUSKY, OHIO, A CORPORATION OF OHIO.

AUTOMATIC METAL-WORKING.MACHINE.

To all whom it may concern:

Be it known. that I, FRANK E. BRIGHT- MAN, citizen of the United States, resident of Sandusky, county'of Erie, and State of ently seen, is designed for the cutting of nut blanks from rods ofthe proper cross section, so that in effect the operation is that simply of severing successive portions from the rod. The formation of these particular articles, however, is merely illustrative of the general operation involved in the invention.

Said invention has as its object the simplification of machines of this character, it being Well known that the prevailing forms are among the most complex types of an tomatic machinery.

To the accomplishment of the above and related ends, said invention, then, consists of the mea'ns hereinafter fully described and particularly pointed out in the claims.

The annexed drawings and the following .description set forth in detail certain mechanism embodying the invention, such disclosed means constituting, however, but one of various mechanical forms in which the principle of the invention may be used.

In said annexed drawings: Figural represents in frontelevation, the lower portion of the supporting frame being omitted, a series of metal working machines embodying my invention and specifically designed for the purpose referred to above; Fig. 2 is an end view of the same; Fig. 3 is a horizontal sectional view of a detail of one such machine taken on the line 3-3, Fig.2; Fig. 4- is a. corresponding vertical section and side elevation of the same detail; and Fig. 5 represents the general mode of operation illustrated in such machine; Fig. 6 is a sectional Specification of Letters Patent.

' yiew of the chuck and its actuating mechanism.

The complete machine illustrated in Fig.

1 consists, as has, been indicated, of an assemblage of substantially duplicate devices.

B, each embodyin in its construction the several elements o the invention. The description of a single one of these component machines or devices will hence suflice, first noting that all are mounted in 'a common frame A comprising end members a a and Patented Oct. 26, 1909;

Application filed April 22, 1908. Serial No. 428,609.

suitable transverse supporting members a' a. Longitudinally alined in such frame is a cam shaft G standing in similar operative relation to each of the component machines while vertically alined in the frame is a series of shafts 0, one for each individual device. Each of, the component devices, or machines, B, that enter into the structure illustrated in Fig. 1 comprises as a prime element a hollow spindle b of familiar construction vertically supported in suitable bearings a in the horizontal-members a of the frame, Such spindles are driven, by means of belts c or other connections, from a main drive shaft C disposed horizontally with and to the rear of the machine frame. Each spindle is furthermore provided with a cone or stepped pulley b by means of which the motion thus received from main drive shaft C is communicated to the intermediate vertical drive shafts C through bolts 0 and thence in turn to cam shaft C through a worm 0 and worm gear 0*. A

second shaft C alined with, and lying below, cam shaft C, bears a pluralityv of worm gears 0 rotatably mounted thereon and driven by Worms (:9 on vertical shafts C Such gears 0 are effective to control a stop device and the cutting tools, as will be later described. Each hollow spindle bis designed to receive a separate piece of stock in the form of rods or bars D and being vertically arranged, it will be obvious that the stock will be fed downward therethrough by gravity as occasion is offered. "To holdthe stock" and cause the same to rotate with the spindles, suitable gripping mechanism of the form illustrated in Fig. 6 is employed. Such parts consist of the cone sleeve b adapted to actuate'bent lever If that are connected in turn to reciprocate an inner tube 11 and thereby open and close the chuck b at the lower end of the spindle. Movement of the the influence of gravity except when the gripping means just described are closed, it is merely necessary to interposebelow it a suitable stop shown'in the form of a plate b Figs. 3 and 5, by means of which a portion of the rod-of a predetermined length is allowed to project below the end of the spindle b. This downward feeding movement will obviously follow instantly 'upon release of the gripping device.

For the simple cutting-01f operation, that alone is necessary in the formation of articles of the character in hand, tool bearing members in the form of two arms B pivotally mounted about an axis adjacent to the lower ends of stock-holding spindle areprovided, Figs. 3 and 4:. Such arms are arranged so that their forward ends may be moved across the lower end of the spindle and the tools 72 b borne thereby, be thus brought into operative relation to successive portions of the'stock D as such portions are presented thereto by theseveral means aforesaid. In form the tools 6 b will of course vary with the character of the operation to be performed; as illustrated in Figs. 3, 4,

and 5, they comprise arc-shaped blades adjustably secured on the outer ends of the arms so as to have theircutting edges directed inwardly'or toward each other; the onesuch cutter b will be preferably a roughing too-l, while the other gives the final form to the object produced. Normally the outer ends ofthe arms, together with the cutters borne thereby, are held in retracted position by means of a tension spring. 1) connecting the rear ends, of. the two arms B. The latter are forced apart and such cutters closed upon the work by'means of a disk bearing lateral cams 0 adapted to simultaneously force apart the rear arm ends. As shown in Fig. 4, the cutters appear in their closed or final cutting position. Rollers b are mounted upon such endsin order to reduce the friction, and the worm gear 0 previously referred to, constitutesthe cam disk.

Having'thus described with sufficient detail the structure of my improved machine, its mode of operation will, it is thought, be so obvious as to require very little further explanation. The stock, which may be of any suitable length, will for the formation of articlessuch as nut blanks be ordinarily formed of .the cross section desired .in the finished article. It will hence onlyremain c to sever'these in succession from the end of the rod giving by means of the severing tool such modification of form as it is desired the article should have. The stock thus placed in a spindle, assuming the cutting Y tools be. withdrawn, will drop until it contacts with the stop. Immediately thereafter the gripping means are actuated from the cam shaft C to grip such stock in the spindle. -The latter being now firmly held in the rotating spindle the stop may if desired be withdrawn, and thereupon the cutting tools advanced in the manner already described. Such advance continues until the projecting portion of the stock has been severed; im-

mediately such severed portion drops from i the machine, the tools are quickly and si-. multaneously retracted, the stop advanced, andthegripping means caused to release the stock in the spindle. Thereupon a further section of stock is presented, and the former operations .may then be repeated.

.While stop plate I)", for gaging the suc cessive lengths of stock fed down by the stock-holding spindles, may be supported and actuated in any suitable fashion, a very simple and convenient arrangement is to se-' cure such plate to the inner face of one of the arms B, its position being such that when the arms are open and tools I) b re-' tracted, the plate will be interposed in the path of rod D. When the arms close, which of course is timed to occur after the stock hasag'ain been gripped in the spindle, plate 6 is withdrawn into the inoperative position shown in Fig. 4:.

Other modes of applying the principle of my invention may be employed instead of the one explained, change being made as-regards the mechanism herein disclosed, provided the means stated by any of the followingv claims or the equivalent of such stated means be employed.

. I therefore particularly point out and distinctly claim as my invention.

.1. In mechanism of the class described, the combination of a stock-holdin spindle disposed so that the stock may be ed therethrough by gravity, means movable into and out of line with said spindle for gaging the length of stock thus fed, means for intermittently operating said gaging means, means for gripping the 'stock' in said spindle, means for rotating said spindle, and means for operating upon successive portions of the stock as they are presented thereto by the several means aforesaid.

2. In mechanism of the class described, the combination of a stock-holding spindle disposed substantially vertically, wherebythe stock may be fed therethrough by gravnected to actuate said last named means;

means cooperative with said spindle for gaging the length of stock fed downwardly to; a vertically disposed sha t in connection with said spindle and connected to be driven therefrom; and gearing connecting the ends of said vertically disposed shaft with the 10 corresponding rotatable cam and operating means.

Signed by me this 18th day of April 1908 FRANK E. BRIGHTMAN.

Attested n WM. F. SENN, OTTo COPE. 

